The invention relates to a quality control method of medicine capable of clearing the lung, eliminating phlegm and relieving cough. The quality control method has the advantages that on the basis of the original standards of pills capable of clearing away lung heat, relieving cough and eliminating phlegm, a thin-layer chromatography method of radix scutellariae is built, methods with good reproducibility, high specificity, clear spot developing and result judging easiness are screened to be added into the revised quality standards, quality control of medicine is improved, the qualitative detection of the medicine is allowed to be accurate, and easy quality control is achieved.